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两亲性线性-超支化多臂共聚物在水溶液中自组装为阳离子囊泡的研究

田华雨, 夏加亮, 林浩, 陈磊, 陈学思, 李悦生, 景遐斌
  

  1. 中国科学院长春应用化学研究所, 高分子物理与化学国家重点实验室, 长春 130022
  • 收稿日期:2005-12-13 修回日期:1900-01-01 出版日期:2006-09-10 发布日期:2006-09-10
  • 通讯作者: 陈学思

Self-assembly of Amphiphilic Linear-hyperbranched Multi-arm Copolymer into Cationic Vesicles

TIAN Hua-Yu, XIA Jia-Liang, LIN Hao, CHEN Lei, CHEN Xue-Si, LI Yue-Sheng, JING Xia-Bin   

  1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2005-12-13 Revised:1900-01-01 Online:2006-09-10 Published:2006-09-10
  • Contact: CHEN Xue-Si

摘要: 利用两亲性线性-超支化多臂共聚物聚乙二醇-聚乙烯亚胺-聚谷氨酸苄酯(PEG-PEI-PBLG)在水溶液中自组装为阳离子囊泡. 利用透射电镜、动态光散射、静态光散射和zeta电位仪对囊泡结构进行了表征. PEG-PEI-PBLG囊泡具有双分子层结构, 壁厚5~10 nm, 直径在100 nm左右. 由于PEI在水溶液中的质子化作用, 囊泡表面携带有正电荷, 其表面电势为+25。2 mV, 因此PEG-PEI-PBLG阳离子囊泡具有担载负电性蛋白的能力.

关键词: 超支化多臂共聚物, 自组装, 囊泡, 聚乙烯亚胺 

Abstract:

Amphiphilic linear-hyperbranched multi-arm copolymer poly(ethylene glycol)-polyethylenimine-poly(γ-benzyl L-glutamate)(PEG-PEI-PBLG) can self-assemble into cationic vesicles in aqueous solution. TEM, DLS, SLS and zeta potential measurement were used to characterize the structure of the PEG-PEI-PBLG vesicles. The vesicles were constituted of 5—10 nm bimolecular layers with average diameter in 100 nm and surface zeta potential of +25.2 mV. The positive charges on vesicles surface were caused by the protonation of PEI in aqueous solution. The cationic vesicles have an ability to carry negatively charged proteins.

Key words: Hyperbranched multi-arm copolymer, Self-assembling, Vesicles, Polyethylenimine

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